From the following setup.py file, I am trying to create a pure-python wheel from a project that should contain only python 2.7 code.
from setuptools import s
Adding the classifiers field to my setup.py fixed this issue.
from setuptools import setup setup( name='foo', version='0.0.1', description='', url='', classifiers=[ 'Programming Language :: Python :: 2.7', ], install_requires=[ 'bpython', 'Django==1.8.2', ], )